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<?php |
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/** |
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* @author Gerard van Helden <[email protected]> |
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* @copyright Zicht Online <http://zicht.nl> |
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*/ |
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namespace Zicht\Tool\Script; |
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use Zicht\Tool\Util; |
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/** |
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* Buffer to write compiled code to |
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*/ |
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class Buffer |
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{ |
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/** |
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* The result buffer |
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* |
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* @var string |
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*/ |
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protected $result; |
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/** |
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* Initialize an empty buffer |
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*/ |
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public function __construct() |
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{ |
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$this->result = ''; |
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$this->indent = 0; |
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} |
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/** |
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* Write some code to the buffer |
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* |
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* @param string $data |
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* @return self |
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*/ |
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public function write($data) |
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{ |
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return $this->indent()->raw($data); |
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} |
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/** |
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* Write an EOL character |
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* |
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* @return self |
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*/ |
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public function eol() |
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{ |
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$this->result .= PHP_EOL; |
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return $this; |
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} |
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/** |
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* Write some data without formatting. |
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* |
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* @param string $data |
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* @return self |
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*/ |
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public function raw($data) |
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{ |
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$this->result .= $data; |
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return $this; |
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} |
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/** |
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* Write a line with indentation and a newline at the end. |
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* |
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* @param string $data |
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* @return self |
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*/ |
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public function writeln($data) |
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{ |
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return $this->write($data)->eol(); |
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} |
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/** |
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* Adds indentation to the buffer if $increment is not specified. Otherwise increment the current indentation |
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* $increment steps. You should pass a negative number to outdent. |
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* |
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* @param int $increment |
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* @return Buffer |
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*/ |
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public function indent($increment = null) |
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{ |
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if (null !== $increment) { |
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$this->indent += $increment; |
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if ($this->indent < 0) { |
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throw new \InvalidArgumentException("Indent can not reach below zero!"); |
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} |
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} else { |
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$this->raw(str_repeat(' ', $this->indent)); |
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} |
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return $this; |
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} |
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/** |
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* Return the buffer contents. |
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* |
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* @return string |
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*/ |
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public function getResult() |
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{ |
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return $this->result; |
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} |
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/** |
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* Shorthand method to add the specified variable as it's php representation. |
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* |
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* @param mixed $var |
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* @return Buffer |
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*/ |
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public function asPhp($var) |
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{ |
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return $this->raw(Util::toPhp($var)); |
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} |
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} |
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In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: